Overcharge and discharge protection to prevent overcharge and discharge of the battery, Overcurrent protection to prevent abnormal high current of battery. Balance protection, battery voltage balance, make battery life longer Stable heat dissipation, stable heat dissipation of the aluminum substrate, safety protection absorbs anti-high voltage, reduces MOS tube breakdown, ultra-low internal resistance MOS Suitable for most electric tools on the market, electric scooters, electric bicycles, electric tricycles, electric motorcycles, electric vehicles, electric tools, etc. Different batches, the appearance, color may be different, which does not affect the use Colour:silver + green Material:PCB+Metal Size:63 x 90 x 9mm Package Contents: 1 x Protection Board 1 x Cable Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.